/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.kie.kogito.spring.auth;

import java.security.Principal;
import java.util.Collection;
import java.util.Optional;

import org.kie.kogito.auth.IdentityProvider;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;

import static java.util.Collections.emptySet;
import static java.util.stream.Collectors.toSet;

@Component
public class SpringIdentityProvider implements IdentityProvider {

    private Optional<Authentication> getAuthentication() {
        return Optional.ofNullable(SecurityContextHolder.getContext().getAuthentication());
    }

    @Override
    public String getName() {
        return getAuthentication().map(Principal::getName).orElse(null);
    }

    @Override
    public Collection<String> getRoles() {
        return getAuthentication().map(a -> a.getAuthorities().stream().map(GrantedAuthority::getAuthority).collect(toSet())).orElse(emptySet());
    }

    @Override
    public boolean hasRole(String role) {
        return getAuthentication().map(a -> a.getAuthorities().stream().anyMatch(auth -> auth.getAuthority().equals(role))).orElse(false);
    }
}
